CT-ISG: Reconciling Accountability with Anonymity in P2P Systems

CT-ISG：协调 P2P 系统中的责任与匿名

• 批准号: 0627553
• 负责人: Anna Lysyanskaya
• 金额: $ 35万
• 依托单位: Brown University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-09-01 至 2010-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0627553&HistoricalAwards=false
• 关键词: CT; ISG; Reconciling; Accountability; Anonymity

Anna LysyanskayaBrown UniversityCT-ISG: Reconciling Accountability with Anonymity in Peer-to-Peer Systems0627553Panel: P060979AbstractThis project builds peer-to-peer systems in which peers are motivatedto honestly contribute to the system, yet remain anonymous. Anonymouselectronic cash (e-cash) is used as a tracking mechanism to allow foraccountability without sacrificing privacy.E-cash matches the untraceability properties of physical coins: thesame bank is responsible for dispensing e-cash to buyers, and forlater accepting it for deposit from sellers, and yet it cannot tracehow buyers spent their money.As a result, e-cash is ideally suited for serving as a currencyin p2p systems: privacy is a key feature of many p2p applications,such as onion routing and shared backup.This project combines systems-building and cryptography work. Ourstarting point is compact e-cash, a recent invention of one of thePIs, which improves upon the time and space requirements of previousschemes. In addition, primitives that allow sellers to quickly proveproperties of data that they offer for sale, without revealing thedata itself are being developed.These cryptographic innovations are being deployed in real distributedsystems, including the e-cash bank and p2p applications such as onionrouting, shared downloads, data backup, and distributed computation.Innovations in these systems surround the development of contractsthat define the interactions of peers in these systems. Contractsensure that buyers and sellers act honestly.This project advances our understanding of distributed system withautonomous members. These systems require incentives for peers torender services, yet these incentives must be provided withoutcompromising participant privacy.

Anna Lysyanskaya 布朗大学 CT-ISG：协调点对点系统中的责任与匿名0627553面板：P060979摘要该项目构建了点对点系统，在该系统中，激励同伴诚实地为系统做出贡献，但保持匿名。 匿名电子现金（e-cash）被用作一种跟踪机制，以便在不牺牲隐私的情况下进行问责。电子现金与实物硬币的不可追踪性相匹配：同一家银行负责向买家发放电子现金，并随后接受其存款卖家，但它无法追踪买家如何花钱。因此，电子现金非常适合在 P2P 系统中充当货币：隐私是许多系统的关键特征p2p应用程序，例如洋葱路由和共享备份。该项目结合了系统构建和密码学工作。 我们的出发点是紧凑的电子现金，这是PI之一的最新发明，它改进了先前方案的时间和空间要求。 此外，正在开发允许卖家快速证明他们出售的数据属性而不泄露数据本身的原语。这些加密创新正在部署在真实的分布式系统中，包括电子现金银行和 p2p 应用程序，例如洋葱路由、共享下载、数据备份和分布式计算。这些系统中的创新围绕着合约的开发，这些合约定义了这些系统中对等点的交互。 合约确保买家和卖家诚实行事。这个项目增进了我们对具有自治成员的分布式系统的理解。这些系统需要对提供服务的同行进行激励，但提供这些激励必须不损害参与者的隐私。